Spring-scale.



J H. OSBORNE. SPRING SCALE.

APPLICATION FILED P51342. 1906.

lfi

ighly desirable that 'the long gage-arm be quickly and accurate y brought UNiTED STATES PATENT oFF-ron.'

JOHN- n. o'sBoRNE; or ANDEnsON, INDIANA. I Y spsnncscALi-z.`

To all whom it may concerne.

Be it known that I JOHN H. OsBonN-E, a

State of'Indiana, have invented certain new and useful Improvements in S ring-Scales,1

of which the following is a l and cle'ar specification,l reference being had 'to the a'oeompanying drawings, in which- Figure 1 is a side elevation of a well-known type of computing-scale with the casing artly broken 'away to show my attachment; Pig. 2, a vertical sectional view of the attachment, showing the pistonin its lowermost position Fig. 3, a similar view showing the piston raised; Fig. 4, a transverse section on theline4 4 of Fig. 2; Fig. ,5, a-transverse section on the line 5 5 of" Fig. 3.

The object of this invention is to proivide a sirnple attachment which -will insure the golnter being quickly brought to rest, therey preventing undesirable vibrations of the ointer, which prevent the quantity weighed eing quickly read on the scale. Y

The device is espeeially'adapted for com- Futing-scales, as in that class of scales it is i ointer or to rest.

The invention has special relation to that Tpe of arresters in, whiehis ein loyed a dash-pot .or eup.containing`a li ui such as oil, in which liuid dips a pistonike' meinber or disk carrie by a rod depending from a part of the scale-beam.

To the accomplishment of this object and such others as, may hereinafter a ipear, the Ainvention consists of the parts an co1nbination of arts hereinafter fully-described, and particu ar1ypointed out in the appended claims, reference being had to the aecom-b panying drawings, forming a part of this s eeiiication, in which .the saine reference characters designate like parts throughout the several views'.

Referring to the drawings by reference characters, .i designates the cylindrical cup containing a suitable quantity of oil, this'eup having a. closed bottoni and a screw-plug: closure at its 4upper end, this plug being provided with a central ope-ning for the free me sage 'of the vertieaIIy-refil:rocating rml B, this rod having its upper end flattened at b, where it is pivote-ily but nim-rotatably nttached to the end ll of the sealelbealn.

Spacification of Letters Patent. appaia/cion am rbrwy 12, 190e: sein N0.- 300,701.

Patented Dee. 4, 190e.

The cylindrical cup is supported. on the base of the scale in such manner as to be eapable of axial rotation, the preferable way consisting of a screw a', attached to the bottom of the cup and being screwed into the steni of a nut F, the ilange or collax on the nut lying below the base of the scale and the stemserving as apivot. To hold the cylinder lrmly but not rigidly to the base, a coilspring f is interposed between the head of the nut F and the under side of the base-plate of the scale.

To rotate the cylinder, it maybe provided with a short levervG at its lower end, er it may of course be provided withany' other suitable device for convenience in adjusting it rotatably. f The piston-like member on the lower'f'end-of the rod B consists of a disk C,

rotatabl mounted on the rod and fitting loosely 1n the cylinder. This disk is provided with `two or more holes c, and it. is 'notched at its edge to engage a rib a2, running vertically on the interior of the cylinder, whereb when the cylinder is rotated this disk wil rotate with it, while the rod will remain stationary. Another' disk b2 iits against the lower face of the disk C and is roviderlwvitli'lioles b", which are ada' )ted to e brought intoregister with the ho es c in the up er disk. This lower disk is ailixed Le the rod) B and is therefore non-rotatable.

lt will be observed from the above descriptionthat in order to regulate the device i t is simply necessary to adjust the cylinder rotntively, as in that way the size of the openings through the disks )nav be determined. A. eonvenient'nleans for thus adjusting the size of the oilassages through the piston member ishighly (l) lsi1'il,l,\leas the action of the retard-l ing-piston varies with different kinds of' oil and different temperatures, as is clrrions.

Upon tli'e stein B at a point. above 1hr e \flinder is adjustnbly secured, by means of a set-screw d, a collar l), to whose lower end fis attached al beveled nnn'ulnr valve lI of n snilable llexible material. This 'vulve device is su adjusted on the stem that win-n the perils of the scale. are in normal, position the valve will be near to, but not against. :i \.;ilyus.-.ni. formed around the central ri'yening ii: iin` van or plug o.. flhe object of this valve in im"- vent evzipor'atirm and len-liege of the cil and also ingress efdirt during transporta! ion and at. other times while the scale is notv in use.

When it is desired to close the' to p of the dashpot, Vthe weight on the tare-beam may be moved'orward far enough to hold 'the valve normallydown against its seat, or, if necessary, the scale-beam may be fasteneddoyvnin de'nl down below the point of equilibrium by t e spring. This causes the pointer to swing quickly to its normal position at zero and also to prevent the pointer swinging far enough beyond zero to strike the easing-of the scale. I

The letter b indicates a disk attached to the stem B and having its outer end flanged downwardly. This disk is for the purpose of preventing the oil from splashing through the opening in the top of the dash-pot, and it is so positioned on the stem that .it is out of the oil when the stem is on the upward stroke. It will be apparent to those skilled in the art that various mechanical embodiments of the invention are possible, and I therefore do not wish to be limited to the exact arrangement ,and construction shown.

What I claim, and desire to secure byvLetters Patent, is

v 1. In combination with a scale whose beam is normally drawn downward at itsend, a dash-pot, a piston-rod extending into the dash-pot through its top, and a combined valve and arrester adjustable on the stem independently of the piston, substantially as and for the purpose set forth.

2. .In combination with a scale, a depending rod non-rotatably attached to the scalebeam and provided with a piston at its lower end, said piston being composed of a rotatable and a non-rotatable member both of which are provided with reffistering apertures, and a rotatable cylindrical dash-pot provided with means for engaging the rotatable member of thepiston, for the purposes set forth.

3. In combination with a scale, a non-rotatable rod dependingfrom the beam thereof and 'carrying' an apertured iston at its lower end,`a rotatable eylindrica dash-pot inelos- This tion of the cy inder regulates the size of the passa es through the piston.

4. combination with a scale, a stem depending from its beam and 4carrying a dasher or piston at its lower end, an oil-cup in which' the pistonworks and whose upper. end is olpen for the passage of the stem, and a splas erplate attached to the stem at a oint above the piston, substantially as set orth.

5. In combination 'with a scale whose beam is normally held down, a stem depending from the beam, an axially-rotatable oil 'cup or cylinder in which the stem works,

means forfrictionally holding this cylinder against rotation, a piston on the stem, and means whereby the rotation of the. cylinder varies the retardin actionjof the iston in the'li uid centaine in the cup or cy inder.

' 6. ncombination with a scale, a rod depending from thebeam thereof and carrying apertured piston at its lnwer end, a rota- 'ta ble cylindrical dashot inclosing the piston, and means Dwhere y the rotation of the c linder regulates the size of the passages t rough the iston.

. 7. In com ination with a scale whose beam is normally held down, a stem de ending from the beam, an axially-rotatab e oil cup or cylinder in which the stem works,

means for holding this cylinder against rotation, a piston on the stem, and means whereby the rotation of the cylinder varies the retarding action ofthe piston in the liquid contained in the cup or cylinder.

8. In combination with a scale embodying a beam, a stem depending from its beam, a dash-pot, means for normally drawing down the scale-beam, and a resilient buffer or arrester carried by the stem at .a point just above the dash-pot whereby when the scalebeam. rebounds below equilibrium the arrester will strike the dash# ot, substantially as and for the 'purpose set orth.

In testimony whereof I hereunto alx my signature, in the resence'of two witnesses, this 1st day of Fe ruary, 1906.

JOHN H. OSBORNE.

Witnesses: 

